Example

The statement

EVALuate ($1=1.0)

sets the symbol $1 to 1.0, whereas

EVALuate ($1=$1+2.2)

increases it by 2.2,

EVALuate ($1=$1*COS(2.*$PI$1))

sets it to 3.00498, and

EVALuate ($2="a"+"b"+encode($1))

sets the symbol $2 to the string “ab3.00498".